Table 1.
Clinicai, electrocardiographic, and functional characteristics of the study population
| Characteristics | n = 100 |
|---|---|
| Age in years, mean ± SD (median) | 59 ± 8.8 (59.1) |
| Male gender (%) | 65 |
| Ethnicity (%) | |
| White | 73 |
| Afro-Brazilian/Asian | 21 / 6 |
| Systemic arterial hypertension (%) | 97 |
| Diabetes mellitus (%) | 70 |
| Dyslipidemia (%) | 54 |
| Smoking/obesity (%) | 9 / 17 |
| Angina/previous myocardial infarction (%) | 30 / 34 |
| Heart failure (%) | 27 |
| Cerebrovascular disease/peripheral vascular insufficiency (%) | 13/55 |
| Duration of hemodialysis in months, mean ± SD (median) | 53.8 ± 30 (48.3) |
| Medical therapy (%) | |
| Angiotensin-converting enzyme inhibitor or angiotensin receptor blockers | 50 |
| Beta-blockers/calcium channel antagonists | 84 / 31 |
| Acetylsalicylic acid/statins | 84 / 62 |
| Amiodarone | 1 |
| Conventional electrocardiogram (n = 100) | |
| Heart rate (beats/min) | 73 ± 15.2 |
| Sinus rhythm/atrial fibrillation | 99% / 1% |
| PR interval (ms) | 173.2 ± 24 |
| QRS (ms) | 91.4 ± 17.5 |
| First-degree atrioventricular block | 11% |
| Right bundle branch block/left bundle branch block | 4% / 4% |
| Mean QTc interval (ms)/prolonged QTc (%) | 436.4 ± 27.6 / 33% |
| QT dispersion (ms) | 50.7 ± 24.7 |
| Signal-averaged ECG positive (%), n = 100 | 3% |
| Echocardiogram (n = 99) | |
| Left atrium (mm), mean ± SD | 40.6 ± 6.4 |
| Interventricular septum/posterior wall (mm), mean ± SD | 11.7 ± 2 / 11 ± 1.7 |
| Left ventricular diastolic diameter/left ventricular systolic diameter (mm), mean ± SD | 50.5 ± 6.1 / 34 ± 6.6 |
| Left ventricular ejection fraction (%), mean ± SD | 59.5 ± 10.8 |
| Left ventricular ejection fraction ≤ 50% (%) | 21 |
| Cardiac mass index (g/m2), mean ± SD | 125.2 ± 29.7 |
| Diastolic dysfunction (%) | 78 |
| Segmental alterations (%) | 26 |
| Myocardial perfusion scintigraphy (n = 89) | |
| Normal/altered/ischemic (%) | 62 / 27 / 11 |
SD: Standard deviation; ECG: Electrocardiogram.